:root {
  color-scheme: light dark;
  --bg: #f6f4f1;
  --fg: #1c1917;
  --muted: #57534e;
  --link: #1d4ed8;
  --rule: #d6d3d1;
  --card: #fffcf8;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1917;
    --fg: #f5f5f4;
    --muted: #a8a29e;
    --link: #93c5fd;
    --rule: #44403c;
    --card: #292524;
  }
}
* { box-sizing: border-box; }
html { font-size: 18px; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: "Source Serif 4", "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
}
main {
  max-width: 40rem;
  margin: 0 auto;
  padding: 4rem 1.5rem 5rem;
}
.card {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 2rem 1.75rem;
}
h1 {
  font-size: 2rem;
  font-weight: 650;
  line-height: 1.2;
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
}
p { margin: 0 0 1rem; }
p:last-child { margin-bottom: 0; }
.muted { color: var(--muted); }
a { color: var(--link); }
ul {
  margin: 0 0 1rem;
  padding-left: 1.2rem;
}
li { margin: 0.35rem 0; }
nav { margin-top: 1.5rem; padding-top: 1rem; border-top: 1px solid var(--rule); }